The previous structures presented for the Hg(OAc)2 oxidation product of creatine, the condensation product of methylguanidine and diethyl oxalate, and the peracid oxidation product of 1-methyl-2-amino-dihydropyrimidines are all replaced by a revised formulation, 2-methylamino-1H-imidazole-4,5-dione on the basis of the pKa values (0.62 and 7.87) and the spectra. The equilibria between this thermodynamically controlled product and the previous formulations are discussed.
在 pKa 值(0.62 和 7.87)和光谱的基础上,用修订后的配方 2-甲基
氨基-
1H-咪唑-4,5-二酮取代了之前介绍的
肌酸的 Hg(OAc)2 氧化产物、甲基
胍和
草酸二乙酯的缩合产物以及 1-甲基-2-
氨基二氢
嘧啶的过酸氧化产物的结构。讨论了这种受热力学控制的产品与之前配方之间的平衡关系。